.l{float:right;   
     position:fixed !important; top/**/:0px;   
     position:absolute; z-index:100; top:expression(offsetParent.scrollTop+200);left:5px;}
.r{float:left;   
     position:fixed !important; top/**/:0px;   
     position:absolute; z-index:100; top:expression(offsetParent.scrollTop+200);right:5px;}